Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2fe52d2ddf4661…

MALICIOUS

PDF

78.9 KB Created: 2021-08-29 16:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8938bd36e4c87bc669a786e4875f2feb SHA-1: 3721a0292b261a7bf8e8a3648c46c6915d75d638 SHA-256: 0c2fe52d2ddf4661fc8e77add85c2253091cbb511d5d7103484d8d82ffd0bf97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and links pointing to potentially compromised WordPress upload directories. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9f291a0d41475622924c50f4ffaaa5f0/rogoxejemowureruvakof.pdf In PDF document text
    • http://metalzilembo.it/userfiles/files/mukutuz.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1c1a287a7---bolulu.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8900cab904---59343599568.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f400c292173---posogimiwixojikodulanud.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/147e312e67cb065de8b716317d4943c4/8736949385.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c18b339e49---xujametesotesapiminosas.pdfIn PDF document text
    • https://digireg.org/upload/69316413324.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/caa1fd255a0e474b1f7e7eab96b7b1e8/zanuxukivelutasa.pdfIn PDF document text
    • https://saporidelletnastore.it/file/nanajulofefubisu.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/fpe3ikgdb2jltd678gl3r128cv/26854440742.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de5fb4dfa0---69814350293.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/ec7ea18668b45cde42fdd8a4ab1dedd3/15907335849.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/25838521921.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/pasodiluwirofatefi.pdfIn PDF document text
    • http://citra.cl/userfiles/file/52961891696.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/o1kdac061rvte1m361bfs984vb/xerakukowefanubalit.pdfIn PDF document text
    • http://giaphutelecom.com/tctt/sites/aaa/file/bafikuku.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/768d7fa435d0152bab749a7006614f6f/zatanazitolatisegu.pdfIn PDF document text
    • https://ghnservizi.com/file/nuzuviroxewizire.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/wawiroxapugomod.pdfIn PDF document text
    • http://falerisztika.hu/tmp/xupigazojemuzasotimazovex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=assistant+office+manager+dutiesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 16556 bytes
SHA-256: 34d430910c4777caab33178113d46802017619469f6c864c486113ccb8a93b34
font_01_sfnt_off0000fdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBD 10852 bytes
SHA-256: 4c921f0d48ae3e53adcfaf9cce4fa25eb1728337c2e06f066d67e828f092372d
font_02_sfnt_off000116ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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